Ontologia

HydroBASINS lev08 watershed · #2080458990

Bassin de l'Orne

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 3 administrative regions : Calvados, Mayenne, Orne

Pfafstetter: 23230609

Sub-basin area

1 182,4km²

Upstream area

1 182,4km²

Discharge

19,12m³/s

Mean elev.

210m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de l'Orne8 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

143 communes (GADM L5)

18 intersecting protected areas

9 more protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

5 458 distinct species · 187 766 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

187 766 obs · 35 cellules
Obs. / cellule
≥ 24 791
16 642–24 790
6 467–16 641
2 247–6 466
< 2 247

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 33 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.

ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de l'Orne : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 6 types (connectance 18.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
95
Connectance
0.180
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

9,8°C

Annual rain

746mm

Moisture idx (CMI)

-0,05

Runoff

482mm/an

PET

782mm

AET

563mm

Mean slope

2,3°

Water table

165cm

Forest

4%

Crops

44%

Urban

1%

Protected

22%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)